Head for a hair trimmer



FIG. 1 is a perspective view of our new design for a head for a hair trimmer;

FIG. 2 is a front view thereof;

FIG. 3 is a left view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a right view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines illustrate a portion of the head for a hair trimmer that forms no part of the claimed design. 

CLAIM The ornamental design for a head for a hair trimmer, as shown and described. 